4. Rheology of food powders
According to standard NF X 11-630 (cf.
), a powder is a collection of particles
whose dimensions are usually less than 1 mm.
In the food industry, the particulate state is often an intermediate
state between two continuous phases. Thus, powders are obtained by
grinding (flours...), atomization (milk powders...), crystallization
(sugar...) from a continuous solid phase (wheat grain...) or liquid
phase (milk, solution...). This intermediate state is then preserved,
formulated, transported and, in many cases, transformed into a new
continuous liquid phase (reconstituted milk, etc.), pasty phase (bread
dough, etc.) or solid phase (instant preparations, desserts, etc.).
Nearly 60% of food products, whether natural or manufactured, are,
at least at some stage in their transformation process, in the form
of divided...
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Rheology of food powders